package com.joomtu.mapred.temperature;

import java.io.IOException;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;

public class MaxTemperatureWithCombiner {

	public static void main(String[] args) throws IOException {
		if (args.length != 2) {
			System.err
					.println("Usage: MaxTemperatureWithCombiner <input path> "
							+ "<output path>");
			System.exit(-1);
		}

		JobConf conf = new JobConf(MaxTemperatureWithCombiner.class);
		conf.setJobName("Max temperature");

		FileInputFormat.addInputPath(conf, new Path(args[0]));
		FileOutputFormat.setOutputPath(conf, new Path(args[1]));

		conf.setMapperClass(MaxTemperatureMapper.class);
		/* [ */conf.setCombinerClass(MaxTemperatureReducer.class)/* ] */;
		conf.setReducerClass(MaxTemperatureReducer.class);

		conf.setOutputKeyClass(Text.class);
		conf.setOutputValueClass(IntWritable.class);

		JobClient.runJob(conf);
	}
}